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Finding the Fourth Proportional to 68,729.32, 103,133.58 and 37,139.44

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Solution

The fourth proportional to 68,729.32, 103,133.58 and 37,139.44 is: 55,730.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,729.32 : 103,133.58 = 37,139.44 : x
  2. Step 2: Convert to fraction form
    68,729.32/103,133.58 = 37,139.44/x
  3. Step 3: Cross multiply
    68,729.32x = 103,133.58 × 37,139.44
  4. Step 4: Simplify right side
    68,729.32x = 3,830,323,406.40
  5. Step 5: Solve for x
    x = 3,830,323,406.40/68,729.32
  6. Step 6: Final answer
    x = 55,730.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.